Warp stop-motion for pile-fabric looms.



S. B. CUTTING & E. MARSHALL. WARP STOP MOTION IOR PILE FABRIC LOOMS.

. APPLIOATION FILED AUG. 29, 1911. 1 ,0 1 9 ,026 Patented Mar. 5, 1912.

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v I M wi/f/wwoeoz 5 I Mow! S. B. CUTTING & E. MARSHALL.

WARP STOP MOTION FOR PILE FABRIC LOOMS.

APPLICATION FILED AUG. 29, 1911.

Patented Mar. 5, 1912.

S. B. CUTTING & E. MARSHALL.

WARP STOP MOTION FOR PILE FABRIC LOOMS.

APPLIUATION FILED AUG. 29, 1911.

a SHEETS-SHEET s.

Patented Mar. 5,

wane/sods UNITED STATES PATENT OFFICE.

SAMUEL B. CUTTING AND EDWARD MARSHALL, OF BRIDGEPORT, CONNECTICUT, AS-

SIG-NORS TO THE SALTS TEXTILE MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

WARP STOP-MOTION FOR PILE-FAIBRIC LOOMS.

Specification of Letters .Patent.

Patented Mar. 5, 1912.

Application filed August 29, 1911. Serial No. 646,636.

To all whom it may concern Be it known that we, SAMUEL B. CUTTING and EDWARD MARSHALL, citizens of the United States, residing at Bridgeport, 1n the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in \Varp Stop-Motions for Pile-Fabric Looms, of which the following is a specification.

Our invention relates to a warp stop mo,- tion for looms, and more particularly for pile fabric'looms, by which we are enabled to place drop devices upon the pile warps passed between, the divided back warps.

In double pile fabric looms as usually constructed the pile warps come up on the under side of the lower dividing roll, and the disposition of this roll does not provide sufiicient space between the back warps to permit the use of drops on the pile warps. It has, therefore, been proposed to carry the'pile warps up through the back warps and over parallel easing rods and to support the drop devices on the short lengt s of the pile warps which extend across and bridge the space between the easing rods. \Vith such an arrangement, when using a pile warp-0f soft, flutfy material, an appreciable quantity of lint was thrown off, which collected in balls in front of the drops and was carried into the fabric, and special means were employed to prevent the accumulation of an undesirable quantity of lint. Moreover, the carrying of. the pile warps through and above the back warps occupied considerable space and necessitated the passing of the pile warps down from the easing rods through the back warps in order to lead them properly to the heddles. By moving the lower dividing roll forward and leading the pile warps over, instead of un der, the lower dividing roll, we are enabled to do away with the necessity of carrying the pile warps above the back warps for the application of circuit-closing drops to the pile warps, and to maintain thereby the compactness of the two sets of warp threads as heretofore.

The invention will be understood by reference to the accompanying drawings in which- Figure 1 is a sectional view partly diagrammatic of a pile fabric loom embodying the invention; Fig. 2 a similar view on an enlarged scale showing. the circuit connec- 1, all parts of the loom not necessary for a complete understanding of the'invention being omitted; Fig. 4 a top view of the swingmg terminal frame; ig. 5 a transverse sec- -t1on on the plane of the line 5-5 of Fig. 4; Fig. 6'an enlarged view of a portion of Flg. 1 to illustrate the swinging movement of the terminal carrying frame; and Fig. 7 a view of a modification to illustrate the operation by mechanical, instead of electrical, means.

Similar reference numeralsjndicate similar parts in the several views.

Referring to the drawings, the numeral 1 designates the main warp beam; 2 the main or back warps which. pass over the whip roll 3; 4 the pile warp beam; 5 the pile warps, and 6 the let-off rolls for the pile warps. Both sets of Warp threads are led through the usual harness mechanism in.- dicated at 7 for the'formation of thesheds, the'pile warps being carried up through the lower set of backwarps and let ofi in. termittently to float between the two back warps in the usual and well known manner. The pile warps carry metallic drops 8, and the back warps similar drops 9, these drops being adapted when a Warp thread breaks, and by this is meant to include not only an actual severance of the warp but any abnormal slackness thereof, to close a controlling circuit 10 for the loom-stopping mechanism. This mechanism may be of any known type and, for the purpose of illustration, we have selected one which. comprises an auxiliary knock-off lever 11 which rests upon the main kn'ock-ofi' lever 12, both of -which levers are pivoted on a bracket extending from the breast beam 13. Secured to lever 11 is a bracket which carries an electro-magnet 14 included in circuit 10. The armature 15 of said magnet projects toward the lay 16 and j thus act on'shipper. lever 18 from its-retaining shoulder to" stop the loom.

fjTo 'eflect the closing'of-eircpit 10 to energize magnet 14 for the pur ose above'stated 'we vemp oy metallic drop evicesof a well known type. The form shown is provided with a closed slot 19 in the upper part.'threof, and an open-ended slot 20 in the lower 4 part thereof, the latter'serving as a thread aperture, as indicated in the drawings.

The back warps 2 are crossed-over the usual lease rods and the two sets are .sepa; rated by the upper andlower dividing-rolls,

21 and 22, jandthencethrough theharness. "To enable the application of-Ithe d'ropide vices to the ile warps without carrying the pile warps a ove the back warps'we lead the pile warps 5 either over or under the lowerroll 22 into the space between the rovide a short" horizontal section of the pile warps to accommodate the drop devices, andlas a supdividing 29' divided back warps. To

port for the terminals of circuit 10, we provide aframe shown in Figs. 4 and 5 which comprises suitable end pieces 23 connected by rods 24 as shown in Figs. 1 and 2. We

connected to the respective terminals of circuit 10. When two or more banks of drop devices are employed a convenient wa of electrically connecting the blades 28 o v the several banks is by a metallic bar 29, as

- shown in Fig. '2.

The compound terminal for the drops 9 of the back warps is similar to that above described, but, I instead of mounting these terminals in a swinging frame, the bars 27 are secured in fixed supports on opposite sides of the loom frame. 1

During the normal running of the .loom the drop devices on both the back warps and pile warps will be supported on the warp threads out of contact with the correspondin blade 28' of the' compound terminal.

W en, however, either aback or pile warp breaks, the corresponding drop will be released and, falling'upon the blade 29, will close circuit 10, it being understood that the drop devices are always inlcontact with bar 27 of said terminal. The ma et 14 being thus energized, the knock-o mechanism will be set in operation to stop the loom.

. As thepile warp heddles come together and the shed closes, a swinging motion will 'b. imparted iit which the terminals for the pile war s, and said frame will be moved to the left y springs 30 connected to brackets 26 and to the frame,

thereby taking up the slack in the pile warps As theshed o ens the action of the harness will pullthis 'ame forward'against the stress of springs 30. This forward and back swinging movement of the frame caring the dro s for the pile warps will clean lint to asuflicient extent to prevent an acc mulationef an undesirable lamount fwhlch {might'otherwise be carried into'the fabricx Thisswinging movement is indicated in Fig. 6, the full line position of the drops-being that occupied by them when the shed is open, and thedotted line position possible to employ a mechanical control, as

shown in. Fig. 7,-in which we have illus- ,trated the swinging frame carrying the compound terminals of the same construction as shown inFigs. 4 and 5. In this-form the shipper lever 18 is released from its re-, taining shoulder by a knock-off finger 31 which ispivoted on the usual weft slide. The knock-off finger is held in normal position out of the path of weft hammer'32 by a rod 33 which is connected thereto and rests upon a horizontal movable rod 34. 'The rod 34 is slidably supported in a bracket 35 fixed to the'breast beam and has pivotally connected to it at oneend a. Y -sha ed lever 36 which is hung on a pivot-37. ivot 37 ex-- tends across the loom frame and at its opposite end supports a similar Y lever to that shown, the'two levers being connected by 'wires or light rods 38.

The wires or rods 38 are positioned below and in close proximity to the lower ends of the drop devices so that when a warp .mit the supporting rod 33 to drop into a notch 39, in said rod. When that occurs the knock-off finger 31 will be lowered into position to be engaged by the weft hammer 32. The knock-off finger has an inclined slot 40 in which travels a pin 41 on the upper end of the supporting rod 33. When the knockoff finger is moved by the weft hammer the v action of the inclined slot on the in 41 will raise the supporting rod 33 out o the notch 39 and a spring 42 fastened in a slot in pivot 37 will move rod 34 to its normal position to the right. If the right-hand drop of Fig. 7 should fall it would engage the righthand wire 38 to move rod 34 to the right so.

" 31. S ring 42 will act to restore rod 34 to 'norma position when knock-off finger 1s moved by the weft hammer,

What we claim and desire to secure by Letters Patent of the United States 1s 1. In a warp stop motion for pile fabriclooms, the combination of stopping mechanism and a controller therefor, means for dividing the back warps, means for leading the pile warps into the space between the divided back warps, and drop devices carried by unbroken 1le warps in said. space, said drops being a apted to set 1n operation said controller when a pile warp breaks or becomes unduly slack to stop the loom.

2. In a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controlling circuit therefor, means for dividing the back warps, means for leading the pile warps into the s ace between the divided back warps, and rop devices carried on unbroken pile warps in said space, said drops being adapted to close the circuit when a pile warp breaks or becomes undul slack. 4

3. Iii a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controlling circuit therefor, means for dividing the back warps, means for supporting the pile warps in the s ace between the divided back warps, and rop devices carried on unbroken pile war 3 at said point of support, said drops eing adapted to close the circuit when a pile warp breaks or becomes unduly slack.

4. In a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controlling circuit therefor,

means for dividing the ck warps, circuit .terminals located in the space between the back warps, means for leading the pile warps through said space, and drop devices carrled on unbroken ile warps in proximity to said terminals, said drops being adapted to close the circuit through said terminals when a pile warp breaks or becomes unduly slack.

5. In a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controllin circuit therefor, means for dividing the back warps, circuit terminals located in the space between the.

over which the back warps are divided, a

frame supported in the space between the divided back warps and over which the pile warps are carried in a substantially horizontal plane, and drop devices carried on unbroken pile warps at said point of support,

said drops being adapted to close the circuit when a pile warp breaks or becomes unduly slack.

' 7. In a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controlling circuit therefor, means for dividing the back warps, a frame in the space between the divided back warps over which the pile warps are carried, a swinging support for said frame, circuit terminals also carried by said frame, and drop devices carried on unbroken pile warps at their point of support on the frame, said drops being adapted to close the circuit through sald terminals when a pile warp breaks or becomes unduly slack.

8. In a warp stop motion for pile fabric looms, the combination of stopping mechanism and a controlling circuit therefor, dividing rolls for the back war s, means for leading the pile warps back 0 the lower dividing roll into the space between the divided back warps, circuit terminals in said space supported above the pile warps, drop devices supported on unbroken pile warps below the terminals, said drops being adapted to close the circuit through said terminals when a pile warp breaks orbecomes unduly slack. A

In testimony whereof we have hereunto signed our names in the presence of two subscribing witnesses. 1

SAMUEL B. CUTTING. EDWARD MARSHALL. Witnesses:

ARTHUR OAKLEY, Elm-mar WINTERBURN. 

